Hyperledger Fabric Java SDK查询正常但创建交易报无效交易合约异常

我正在开发基于Hyperledger Fabric的应用，使用Java SDK与智能合约交互。查询交易可正常执行，但调用创建交易时，触发“Contract Exception”并提示“Invalid Transaction”。

详细信息 #

智能合约代码（Go） #

Fabric网络上部署的智能合约中，CreateContract函数用于根据传入参数创建新合约，若合约已存在则抛出错误，代码如下：

func (s *SmartContract) CreateContract(ctx contractapi.TransactionContextInterface, contractId string, client string, supplier string, description string) (string, error) {
    if contractId == "" {
        return "", fmt.Errorf("Contract Id cannot be empty.")
    }
    if client == "" {
        return "", fmt.Errorf("Client field cannot be empty.")
    }
    if supplier == "" {
        return "", fmt.Errorf("Supplier field cannot be empty.")
    }

    chatAsBytes, err := ctx.GetStub().GetState(contractId)
    if err != nil {
        return "", fmt.Errorf("Failed to read from world state. %s", err.Error())
    }

    if chatAsBytes == nil {
        newContract := LegalContractSchema{
            DocType:      "Legal Contract",
            Participants: []string{client, supplier},
            Description:  description,
        }
        newContractAsBytes, _ := json.Marshal(newContract)
        err := ctx.GetStub().PutState(contractId, newContractAsBytes)

        if err != nil {
            return "", fmt.Errorf("Failed writing to world state. %s", err.Error())
        }
        return "Successfully created contract", nil
    } else {
        return "", fmt.Errorf("Failed to create contract schema, contract already exists.")
    }
}

Java SDK代码 #

调用CreateContract函数的Java代码如下：

Gateway.Builder builder = Gateway.createBuilder()
        .identity(wallet, "admin")
        .networkConfig(networkConfigFile)
        .discovery(true)
        .commitTimeout(60, TimeUnit.SECONDS);

try (Gateway gateway = builder.connect()) {
    Network network = gateway.getNetwork("mychannel");
    Contract contract = network.getContract("legalContract");

    // 提交创建交易
    byte[] createResult = contract.createTransaction("CreateContract")
            .submit("contractId123", "ClientName", "SupplierName", "This is a test description");

    System.out.println("Create Transaction Result: " + new String(createResult, StandardCharsets.UTF_8));
}

查询交易 #

采用相同代码结构的查询交易（GetLegalContractCert）可正常执行：

byte[] queryResult = contract.evaluateTransaction("GetLegalContractCert", "contractId123");
System.out.println("Query Result: " + new String(queryResult, StandardCharsets.UTF_8));

问题 #

调用CreateContract函数时，触发错误：Invalid transaction Contract Exception，查询交易正常，但创建交易失败。

已尝试的排查操作 #

• 验证输入参数：确保contractId、client、supplier和description为UTF-8编码字符串；
• 检查背书策略：确认背书策略与交易使用的节点匹配；
• 调试智能合约：为CreateContract函数添加日志，但未触发日志，表明交易未到达合约；
• 延长超时时间：设置更长的提交和交付超时。

环境信息 #

• Hyperledger Fabric: v2.4
• Java SDK: v2.4
• Go智能合约: Fabric Contract API
• 网络: 单通道（mychannel），包含2个组织和2个节点

连接配置文件 #

{
  "name": "test-network-org1",
  "version": "1.0.0",
  "client": {
    "organization": "Org1",
    "connection": {
      "timeout": {
        "peer": {
          "endorser": "300"
        }
      }
    }
  },
  "organizations": {
    "Org1": {
      "mspid": "Org1MSP",
      "peers": [
        "peer0.org1.example.com"
      ],
      "certificateAuthorities": [
        "ca.org1.example.com"
      ]
    }
  },
  "peers": {
    "peer0.org1.example.com": {
      "url": "grpcs://localhost:7051",
      "tlsCACerts": {
        "pem": "-----BEGIN CERTIFICATE-----\XYF\n-----END CERTIFICATE-----\n"
      },
      "grpcOptions": {
        "ssl-target-name-override": "peer0.org1.example.com",
        "hostnameOverride": "peer0.org1.example.com"
      }
    }
  },
  "certificateAuthorities": {
    "ca.org1.example.com": {
      "url": "https://localhost:7054",
      "caName": "ca-org1",
      "tlsCACerts": {
        "pem": ["-----BEGIN CERTIFICATE-----\XYZ\n-----END CERTIFICATE-----\n"]
      },
      "httpOptions": {
        "verify": false
      }
    }
  }
}

内容的提问来源于stack exchange，提问作者Abdul Mueed